High quality factors of silicon membranes with piezoelectric actuation and detection scheme for biosensing purpose in liquid media

Author

Ayela, C. ; Leïchlé, T. ; Bergaud, C. ; Nicu, L. ; Cattan, E. ; Soyer, C. ; Pugniére, M.

Author_Institution

LAAS-CNRS, Toulouse

fYear

2006

fDate

38869

Firstpage

123

Lastpage

128

Abstract

The paper is about 4 times 4 matrices of piezoelectric membranes that were fabricated by standard micromachining techniques starting with silicon-on-insulator (SOI) wafer. Each membrane (circular shaped) can be individually addressed for actuation and sensing applications through a PbZr_(x)Ti_(1-x)O₃ (PZT) 800-nm thick film. The main objective of this work is to study the dynamic behavior of the piezoelectric membranes in air and liquid media. The results showed high quality factors in air (up to 150) and in water-glycerol (lowered by a factor 4 for a glycerol proportion in water less than 30%) while the resonant frequencies were significantly decreased by the liquid apparent added mass effects

Keywords

Q-factor; biomembranes; biosensors; lead compounds; micromachining; piezoelectric actuators; silicon; silicon-on-insulator; Pb(ZrTi)O₃; PbZr_(x)Ti_(1-x)O₃; biosensing purpose; detection scheme; glycerol proportion; high quality factors; liquid media; micromachining; piezoelectric actuation; piezoelectric membranes; silicon membranes; silicon-on-insulator wafer; water-glycerol; Biomembranes; Biosensors; Electrodes; Etching; Micromachining; Piezoelectric films; Q factor; Resists; Silicon; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

International Frequency Control Symposium and Exposition, 2006 IEEE

Conference_Location

Miami, FL

Print_ISBN

1-4244-0074-0

Electronic_ISBN

1-4244-0074-0

Type

conf

DOI

10.1109/FREQ.2006.275363

Filename

4053741